Speed Force Conduit: Speed Force is a vaguely defined extra-dimensional energy force from which most superspeed-powered heroes draw their powers. The Speed Force serves as the ultimate measure of velocity in the DCU. They are often referred to in terms of barriers: Sound barrier, Light barrier, Time Barrier, Dimensional Barrier, and finally the Speed Force Barrier. In Final Crisis, using the Speed Force, Allen was able to undo the effects of the Anti-Life Equation upon an individual: an ability he used on his wife Iris to free her from the bondage of Darkseid's mind control. He has been revealed to not only be connected to the Speed Force, but is the very source of it, generating it with every step he takes. As such, he presumably has some if not all of the Speed Force-related abilities other speedsters have demonstrated (such as lending and stealing speed), though he has yet to demonstrate such abilities.

Decelerated Aging: Along with every speedster that draws their powers from the Speed Force, the loved ones of the speedsters will gain eternal youth like Jay's wife and Barry's wife ages have shown.

Speed Force Aura: The Flash's body is surrounded by what he calls his "speed force aura". This aura protects him and anyone who is running with him or carried by him, from the effects of using his speed. This includes friction and airborne particulate matter. It may also protect him from injury. He does seem to possess some level of superhuman resistance to injury but this does not extend far past normal physical interactions, as received from normal combat.

Phasing: The Flash has always possessed the ability to control his speed and angular momentum at the molecular level. While in an intangible state, Flash is immune to any airborne viruses and can breathe regularly. He can also vibrate so fast that light does not reflect off him, rendering him invisible. Barry is unique among Flashes and most characters in the DC Universe in that he has complete control over every molecule in his body.

Vibrational Vision: An ability that all Flash's share, Barry is able to see invisible objects that are vibrating too fast for an ordinary person to see such as the barrier that Gorilla City uses to hide itself.

Regeneration: Able to accelerate his healing factor while using the Speed Force to sustain him, he could heal from any injury instantly.

Superhuman Endurance: Can run at accelerated speeds for long periods of time without tiring or stressing his body. The degree of his endurance is unknown, as he's never been shown as getting tired at all.

Superhuman Speed: It appears that Barry Allen can practically run at almost any speed, even exceeding the speed of light under his own power. After returning to life, when he is running away from the league, Barry admits to Superman that the reason why Superman won races against him was due to the races being for charity. Theoretically, speeds greater than Mach 10, are dangerous to both the people and to the environment. This speed would still be the equivalent to approximately 2 miles per second, allowing him to cross the United States in about 23 minutes, or circle the world in about 3 hours. The Flash rarely achieves such speed in populated areas due to the effects of sonic disruptions and air displacements. His cruising speeds are subsonic (less than 770 mph; the speed of sound at sea level). This is fast enough to move through most cities and around people without causing too much disruption to the population. He can also run across bodies of water and up the sides of buildings. Barry is now the fastest being in the universe and the fastest Flash due to the time he spent in the Speed Force and being the creator of it.

Time & Dimensional Travel: Barry Allen has shown to be able to traverse time and dimensions. He previously used the Cosmic Treadmill for this feat, but recently he has shown that he no longer needs to since he can now do it on his own with precision and control.

Limited Flight: By spinning like a helicopter, he can even perform a limited kind of flight. Since his power is a quantum/molecular phenomenon, it is possible for the Flash to be able to fly just as other metas do (and there have been other flying speedsters in the past, such as the deceased Johnny Quick) because he can control his absolute molecular energy and direction and force it in the direction he wished to move without running.

Increased Perceptions: The Flash possesses the ability to alter his perceptions so that falling objects can appear to be standing still and can be caught and moved back to their normal position. He can do this so quickly as to have it happen invisibly to the normal human eye. He can strike a single opponent hundreds of times in a second or multiple opponents two or three times in a second. He can disarm or jam any number of opponents weapons before they are even aware of his movement and can hurl small projectiles at hypersonic velocities.

Supercharged Brain Activity: The Flash's mental abilities are also increased in speed, simple computations can be done at lightning speeds, and his ability to perform normal feats at increased speeds has allowed him to perform incredible feats. Barry can also read at super-speed. Barry is able to avoid telepathic thought manipulation when he accelerates his brain activity.

Vortex Creations: By running in a circle at a certain speed, Barry Allen is able to create a vortex with a variety of affects. One effect is pulling the air away from the center in order to suffocate an enemy. Another effect is levitating whoever and whatever was in the center. Also, able to send anyone or anything into another dimension when running around them. Some other effects are acting as barriers to movement or funnels for toxic gases. Barry Allen can also spin his arms to create directed funnels of hurricane-speed winds that can knock down barriers or reduce the speed of a falling object. When putting out forest fires, what Flash does is create a pocket tornado by running around the perimeter of the area. The updraft lowers the temperature inside the funnel and raises the fire off the ground which takes away its fuel source.

Abilities

Master Detective: Barry is skilled as a forensic scientist.

Chemistry: As a forensic scientist, he is an expert chemist.

Criminal Psychology: As a police officer/forensic scientist, Barry is adept in criminal psychology and often discusses these topics with Batman.

Hope: Barry has the ability to instill hope in others to such a degree, he can successfully use a Blue Lantern Corps Power Ring.

Strength level

Barry has shown that he is able to carry several people at a time when evacuating a dangerous area, whether feats like this are performed while running on adrenalin is not known. Barry possesses the strength level of a man his age, size and weight who engages in intensive regular exercise, and can at least press lift his own body weight. However, his powers allow him to throw punches at speeds that, on impact, can have the same effect someone with superhuman strength can have.